Okay, first off, I'm spoiled as all get out due to the SSD. SUPER silent. Ran it solo for about 2-3 weeks. I have recently (past week or two) added a WD 640GB HDD into the optibay slot. It's rather noisy. It sounds like it's spinning up and down almost constantly and I can hear slight clicking noises from it as it's accessing data. The spin up/downs and clicking are almost constant all the time. I know there are a few threads on it, none seem very definite though. I'm assuming there is nothing wrong with it as I have run disk repair via disk utility and I have run hardware tests on it via apples hardware tests on their discs. I'm having no issues with the drive functioning weird at all either. I have heard some folks say theirs are completely silent, others say load as a freight train. Curious if it's just luck of the draw? Should I RMA it and hope for a more silent one? This drive is currently my home folder for my SSD so because of that reason it's accessed almost constantly while I'm no my machine. Anything that would have to do with anything in the home folder. So I know it'll be spinning up/down like crazy and clicking as accessing, just wasn't sure what's considered "to much". Anyways, very vague questions, and super subjective, just curious some thoughts.